Positive and Negative Air Pressures in Cleanrooms

In the construction and operation of cleanrooms, Guangzhou Cleanroom Construction Co., Ltd. deeply understands that the control of positive and negative air pressures is a key factor in ensuring that the production environment meets strict standards. Today, we will introduce you to the relevant knowledge of positive and negative air pressures in cleanrooms in detail.

Positive pressure means that the air pressure inside the cleanroom is higher than that of the external environment or adjacent areas. In a positive - pressure state, air flows from the inside of the workshop to the outside. This can effectively prevent pollutants such as dust and microorganisms from the outside from entering the workshop, just like an invisible "air barrier" formed around the workshop. For example, in a precision electronics manufacturing cleanroom, a positive - pressure environment can prevent tiny particles from contaminating electronic products and ensure the yield rate of products.

Negative pressure is the opposite of positive pressure. The air pressure inside the workshop is lower than that of the external or adjacent areas. In this case, air flows from the outside into the workshop, mainly used to prevent harmful pollutants inside the workshop from spreading to other areas. For instance, in biosafety laboratories or some chemical product production workshops, a negative - pressure environment can effectively control pollutants such as harmful gases and aerosols, avoiding harm to the surrounding environment and personnel.

For industries that produce high - precision products, such as semiconductor chip manufacturing, even extremely small dust particles can cause chip short - circuits or performance degradation. A positive - pressure environment can keep out external pollutants and maintain the cleanliness inside the workshop, thus ensuring that product quality is not affected.

In production processes involving biological or chemical hazards, a negative - pressure environment is of great significance. For example, when producing certain potentially infectious drugs in a biopharmaceutical workshop, a negative - pressure environment can prevent harmful microorganisms or chemical substances from leaking outside the workshop, protecting the health and safety of operators and surrounding personnel.

A stable positive or negative - pressure environment helps maintain the stability of the air distribution inside the workshop and avoid the spread or cross - contamination of pollutants caused by air flow disorders. This is crucial for the stable operation of continuous production processes, reducing production interruptions or product quality fluctuations caused by environmental factors.

The control of positive and negative pressures is achieved by adjusting the volume of air supply and exhaust. When a positive - pressure environment is required, increase the air supply volume so that the amount of air entering the workshop is greater than the amount of air exhausted. Conversely, if a negative - pressure environment is to be formed, increase the exhaust volume so that the amount of air exhausted is more than the amount of air supplied.

Install high - precision pressure sensors to monitor the air pressure changes inside the workshop in real - time. Once the pressure deviates from the set value, the automatic control system will quickly adjust the operating parameters of the ventilation equipment, such as the rotational speed of the fan, to ensure that the positive and negative pressures are always maintained within the set range.

Reasonably plan the positions of air supply and exhaust outlets inside the workshop and optimize the airflow organization path. For example, adopt air - supply - from - above and air - exhaust - from - below or side - supply - side - exhaust airflow organization methods to make the air flow evenly distributed inside the workshop, effectively avoiding the occurrence of air - flow dead zones and ensuring the effectiveness of positive and negative pressure control.

As a professional purification equipment manufacturer, Guangzhou Cleanroom Construction Co., Ltd. has rich experience and a professional technical team. During the design, construction, and later maintenance of cleanrooms, we can accurately design and debug the positive and negative air - pressure control systems according to the specific production needs and process characteristics of customers. From the selection of ventilation equipment to the installation and debugging of the entire system, and then to the later maintenance, we provide one - stop services to ensure that each cleanroom can have a stable and reliable positive or negative - pressure environment, providing a solid guarantee for the efficient production and product quality of enterprises.

If you have any questions about the control of positive and negative air pressures in cleanrooms or are preparing to build a cleanroom, please feel free to contact us. Guangzhou Cleanroom Construction Co., Ltd. looks forward to working with you to jointly create a safe, efficient, and clean production environment.